package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;

    /**
     * @author gengjian
     * @date 2024/12/09 15:59:43
     * 上传文件
     */
    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException,
            IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException,
            XmlParserException, InternalException {
        //判断桶是否存在
        boolean b = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
        if (!b){
            //不存在则创建桶
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            //设置桶权限为桶所有者可写，所有人可读
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .config(createBucketPolicyConfig(minioProperties.getBucketName())).build());
        }
        //定义minio中对象名
        String fileName = new SimpleDateFormat("yyyyMMdd").format(new Date())
                + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        //上传文件，返回查看文件url
        minioClient.putObject(PutObjectArgs.builder().
                //传到哪个桶
                bucket(minioProperties.getBucketName()).
                //对象名
                object(fileName).

                stream(file.getInputStream(),file.getSize(),-1).
                //文件类型后缀名
                contentType(file.getContentType()).
                build());
        //返回前端查看图片的地址
        return String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),fileName);
    }

    /**
     * @author gengjian
     * @date 2024/12/09 16:42:27
     * 编写桶权限配置的方法 私有因为只有service自己用 可以复用传哪个桶设置哪个桶权限
     */
    private String createBucketPolicyConfig(String bucketName){
        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
